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Number of Pages in this Booklet : 12 Number of Questions in this Booklet : 75Instructions for the Candidates
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4. (A), (B), (C) (D) :(C)
5. OMR OMR ,
6. 7. (Rough Work) 8. OMR ,
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[Maximum Marks : 150Time : 2 1/2 hours]
PAPER-IIIENVIRONMENTAL SCIENCE
(To be filled by the Candidate)
Signature and Name of InvigilatorOMR Sheet No. : ...............................................
Roll No.
(In words)
1. (Signature) __________________________(Name) ____________________________
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D 1 2
D-89-12 1 P.T.O.
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Paper-III 2 D-89-12
1. In a multiple regression model, the f-ratio is used to test the
(A) Variance of the data (B) Standard error of mean (C) R2 value (D) Overall goodness of fit of the
model. 2. If the mean of a sample is 20, the
standard error of mean is 1 and the t-statistic for 95% level of confidence is 2.5, the population mean will be in the range
(A) 17.5 to 22.5 (B) 15 to 25 (C) 20 to 25 (D) 15 to 20 3. The third moment about the mean of a
distribution of a set of observations is a measure of
(A) Mode (B) Skewness (C) Kurtosis (D) Variance 4. Consider an air shed over a city in the
form of a rectangular box. The wind velocity is 5 m/sec normal to left face of the box. The length of the box along the direction of wind is 10 km and mixing height is 1 km. Assuming rapid mixing of the pollutants which are conservative in nature, the concentration of the pollutants in the city would reach 63% of its final value in
(A) 2,000 sec (B) 5,000 sec (C) 10,000 sec (D) 1,000 sec
5. Which one of the following states of
mercury is volatile ? (A) Organic (B) Ionic (C) Atomic (D) All of the above 6. Molar extinction coefficient of H2O2 at
240 nm is 0.04 M1 cm1. The concentration of H2O2 in a solution which has absorbance of 0.6 in a 3 cm curette will be
(A) 5 M (B) 10 M (C) 15 M (D) 20 M 7. A reference solution is to be prepared
with 5 PPM parabenzopyrene (molecular weight = 252). The quantity of parabenzopyrene required for preparing one litre 5 PPM solution is
(A) 252 mg (B) 25.2 mg (C) 5 mg (D) 252 g 8. Which one of the following is a
peroxyl radical ? (A) OH (B) R (C) RO (D) ROO
ENVIRONMENTAL SCIENCE PAPER III
Note : This paper contains seventy five (75) objective type questions of two (2) marks each. All questions are compulsory.
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D-89-12 3 Paper-III
9. Depending upon the amount of net primary productivity the various ecosystems can be arranged in a decreasing sequence of yield.
(A) Tropical seasonal forest Tropical rain forest Temperate Grassland Woodland and Shrubland.
(B) Tropical seasonal forest Tropical rain forest Woodland and Shrubland Temperate Grassland
(C) Tropical rain forest Temperate Grassland Woodland and Shrubland Tropical seasonal forest.
(D) Tropical rain forest Tropical seasonal forest Woodland and Shrubland Temperate Grassland.
10. Which of the following is a correct
sequence of secondary seral vegetation development on any habitat ?
(A) Ecesis Invasion Aggregation Stabilization
(B) Ecesis Aggregation Invasion Stabilization
(C) Aggregation Invasion Ecesis Stabilization
(D) Invasion Ecesis Aggregation Stabilization
11. What is common feature among the
following ? Abies delavayi Aconitum diennorrhzum Adinandra griffthii Aglaia perviridis (A) All have been extinct. (B) All are gymnosperms. (C) All are identified as endangered
species. (D) All are angiosperms.
12. Raunkiaers normal biological spectrum for phanerogamic flora of the world exhibits one of the following sequence of occurrence (%) of different life forms.
(A) Phanerophytes, Hemicryptophytes, Therophytes, Cryptophytes, Chaemophytes.
(B) Phanerophytes, Hemicryptophytes, Therophytes, Chaemophytes, Cryptophytes.
(C) Phanerophytes, Hemicryptophytes, Cryptophytes, Chaemophytes, Therophytes.
(D) Phanerophytes, Chaemophytes, Hemicryptophytes, Cryptophytes, Therophytes.
13. One of the following categories of
earthworms is most suitable for wasteland reclamation.
(A) Epigeic (B) Anecic (C) Endogeic (D) None of the above 14. How many mega-bio-diverse countries
have been identified in the world ? (A) 2 (B) 12 (C) 17 (D) 35 15. Which one of the following is an Ex-
situ method of biodiversity conservation ?
(A) Seed storage (B) DNA Bank (C) Tissue culture (D) All the above
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Paper-III 4 D-89-12
16. Which one of the following is a methyl isocyanate (MIC) based pesticide ?
(A) Sevin (Carbaryl) (B) Temix (Aldicarb) (C) Furadon (Carbofuran) (D) All the above 17. The sequence of fossil fuels in the
order of higher to lower heating value is as follows :
(A) Coal, Petroleum, Natural Gas, Hydrogen.
(B) Hydrogen, Natural Gas, Petroleum, Coal.
(C) Hydrogen, Coal, Natural Gas, Petroleum.
(D) Natural Gas, Petroleum, Coal, Hydrogen.
18. Natural ore of radioactive materials
does not contain which one of the following isotope ?
(A) U235 (B) Pu239 (C) U238 (D) Th232 19. The process of splitting bigger hydro-
carbon into smaller hydrocarbon molecules is called
(A) Pyrolysis (B) Thermal decomposition (C) Cracking (D) Combustion 20. Which one of the following is a
complex in organic fertilizer ? (A) Urea (B) Super phosphate (C) Potash (D) NPK
21. The sequence of ease of decomposition of organic compounds in soil is
(A) Lignin Hemicellulose Starch Crude protein Fat
(B) Crude protein Starch Fat Lignin Hemicellulose
(C) Starch Crude protein Hemicellulose Fat Lignin
(D) Fat Starch Lignin Hemicellulose Crude protein
22. Which one of the following radio-
nuclides has the lowest half life period ?
(A) C14 (B) Sr90 (C) I131 (D) Cs137 23. Match the rules mentioned in Column
I with year of enforcement mentioned in Column II.
Column I Column II a. Hazardous Wastes
(Management and Handling) Rules
1. 2000
b. Biomedical Solid Wastes (Management and Handling) Rules.
2. 1978
c. Municipal Solid Wastes (Management and Handling) Rules
3. 1989
d. The Water (Prevention and Control of Pollution) Cess Rules
4. 1998
Choose the correct code : Codes : a b c d (A) 3 4 1 2 (B) 4 1 2 3 (C) 2 4 3 1 (D) 1 3 4 2
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D-89-12 5 Paper-III
24. Average composition of biodegradable waste in Municipal Solid Waste (MSW) of India is
(A) 30 35%
(B) 40 45%
(C) 55 65%
(D) 60 70%
25. The treatment method recommended
for the human anatomical waste generated from hospitals is
(A) Chemical disinfection
(B) Autoclaving
(C) Incineration
(D) All the above
26. Match the waste class mentioned in
Column I with Color Code of the Collection Container mentioned in Column II.
Column I Column II a. Human
Anatomical Waste 1. Blue
b. Waste Scrap 2. Green
c. Discarded glass ware
3. Red
d. Disposable plastics
4. White
Choose the correct code :
Codes : a b c d
(A) 2 3 1 4
(B) 4 2 3 1
(C) 1 2 3 4
(D) 3 1 4 2
27. Which of the following is true when frequency of occurrence of risk is remote but possible ?
(A) Risk is acceptable.
(B) Risk reduction measures should be implemented.
(C) Risk is unacceptable.
(D) Both (A) and (B) are true.
28. Given below are two statements, one labelled as Assertion (A) and the other labelled as Reason (R).
Assertion (A) : Indirect impacts are more difficult to measure, but can ultimately be more important.
Reason (R) : In areas where wildlife is plentiful, such as Africa, new roads often lead to the rapid depletion of animals.
Choose the correct answer.
Codes :
(A) Both (A) and (R) are true and (R) is the correct explanation.
(B) Both (A) and (R) are true, but (R) is not the correct explanation.
(C) (A) is true, but (R) is false.
(D) (A) is false, but (R) is true.
29. An earthquake measuring over 8 on Richter Scale is rated as
(A) Destructive
(B) Major
(C) Great
(D) Damaging
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Paper-III 6 D-89-12
30. Given below are two statements, one labelled as Assertion (A) and the other labelled as Reason (R).
Assertion (A) : It is difficult to judge how changes in localized gas samples represent more general conditions in the Volcano.
Reason (R) : The composition of the juvenile gases emitted from volcanic vents offen show considerable variation over short periods and distances.
Choose the correct answer. Codes : (A) Both (A) and (R) are true and (R)
is the correct explanation of (A). (B) Both (A) and (R) are true, but
(R) is not the correct explanation of (A).
(C) (A) is true, but (R) is false. (D) (A) is false, but (R) is true.
31. In a false color set, human visual perception is limited to how many independent coordinates ?
(A) Three (B) Four (C) One (D) Five 32. If D = Detector Dimension, F = Focal
Length, H = Flying Height, then Ground Resolution Element (GRE) is equal to
(A) (D/F) H (B) D/F (C) H/F (D) D/H
33. Darkest level of the associated color (RGB) would have brightness value equal to
(A) 0 (B) 256 (C) 255 (D) 2047
34. The efficiency of a MHD power
generator for applied electric field E ,
magnetic field B and velocity of hot
ionized gas U is
(A) |E|
|U| |
B|
(B) |U| |
B|
|E|
(C) |E|
2
|U| |
B|
(D) |E|
2
|U| |
B|
2
35. Match the List I with List II and
choose the correct answer from the codes given below :
List I List II (Constituents
of Particulate
matter)
(Sources)
a. Si 1. Natural Resources b. PAH 2. Incomplete
combustion of fossil fuels.
c. SO24 3. Elements largely
introduced by Human Activities.
d. Pb 4. Reactions of a gas in atmosphere.
Choose the correct code : Codes : a b c d (A) 1 2 4 3 (B) 2 3 4 1 (C) 2 4 1 3 (D) 3 4 2 1
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D-89-12 7 Paper-III
36. For aerosol particles having sizes > 1 m, the terminal settling velocity (VT) of an aerosol particle varies with its diameter (D) as
(A) VT D (B) VT D2 (C) VT D3 (D) VT D3/2 37. Scale lengths associated with synoptic
scale phenomenon in atmosphere are typically in the range
(A) 10 100 km
(B) 200 40,000 km
(C) 10,000 100,000 km
(D) 1 10 km
38. Assume that the atmosphere is
isothermal at 25 C and the estimated maximum daily surface temperature is 35 C, the mixing height is (take adiabatic lapse rate to be 1 C per 100 m)
(A) 3.5 km
(B) 2.5 km
(C) 1.5 km
(D) 1 km
39. The wavelengths of UV-A radiations
are in the range
(A) 200 240 nm
(B) 240 280 nm
(C) 280 320 nm
(D) 320 400 nm
40. Two sounds of 80 dB and 85 dB superimpose at a location. What is the resultant sound at that location ?
(A) ~ 82 dB (B) ~ 87 dB (C) ~ 91 dB (D) ~ 165 dB 41. The coefficient of performance of a
wind turbine for maximum power output is
(A) 13/18 (B) 5/8 (C) 16/27 (D) 11/17 42. Which of the following does not have a
direct role in climate change ? (A) Sulphate and nitrate aerosols (B) Black carbon aerosols (C) Surface ozone (D) Nitric oxide 43. Which method is used to separate
molecules on the basis of their sizes ? (A) Ion exchange chromatography (B) Molecular exclusion
chromatography (C) Adsorption chromatography (D) Thin layer chromatography 44. Which type of support media is used in
different types of electrophoresis ? (A) Agarose gel (B) Polyacrylamide gel (C) Sodium dedecyl sulphate
polyacrylamide gel (D) All the above
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Paper-III 8 D-89-12
45. Which of the following categories of plants get benefitted more due to elevation of CO2 level ?
(A) C3 plants
(B) C4 plants
(C) CAM plants
(D) All of the above
46. Aquifers that extend continuously from the land surface through material of high permeability are
(A) Aquitards
(B) Auicludes
(C) Confined aquifers
(D) Unconfined aquifers
47. Which one of the following is used to determine ambient concentration of suspended particulate matter ?
(A) Cascade impactor
(B) Kjeldahls Flask
(C) Sacchi Disk
(D) Folin-Wu method
48. Which of the following laws states that the solubility of a gas in a liquid is proportional to the partial pressure of that gas in contact with liquid ?
(A) Hicks law
(B) Henrys law
(C) Hardy-Weinburg law of equilibrium
(D) 2nd Law of Newton
49. Maximum CaO is found in
(A) Bauxite
(B) Limonite
(C) Lime Stone
(D) Siderite
50. The sequence of chemical constituents in order of their abundance in a majority of sedimentary rocks is
(A) SiO2 > TiO2 > Al2O3 > Fe2O3
(B) SiO2 > Al2O3 > Fe2O3 > TiO2
(C) SiO2 > Fe2O3 > Al2O3> TiO2
(D) SiO2 > Fe2O3 > TiO2> Al2O3
51. The primary producers in the marine ecosystem are
(A) Eubacteria and Algae
(B) Cyanobacteria and Algae
(C) Algae and Protozoans
(D) All of the above
52. Mycorrhizae can be used as biofertilizers because they
(A) fix nitrogen
(B) fix CO2
(C) solubilise phosphate
(D) kill pathogens
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D-89-12 9 Paper-III
53. Given below are two statements, one labelled as Assertion (A) and the other labelled as Reason (R).
Assertion (A) : Some plants with mycorrhizal fungi are able to occupy habitats that otherwise could not inhabit.
Reason (R) : The importance of mycorrhizal plant interaction is attested by the fact that 95% of all plants have mycorrhizae.
Choose the correct answer : Codes : (A) Both (A) and (R) are true and
(R) is the correct explanation of (A).
(B) Both (A) and (R) are true but (R) is not the correct explanation of (A).
(C) (A) is true, but (R) is false. (D) (A) is false, but (R) is true. 54. An interactive association between two
populations in which one population benefits from the association, while the other is not affected, is
(A) Mutualism (B) Neutralism (C) Commensalism (D) Symbiosis 55. The method for downstreaming of
ethanol from fermentation broth is (A) Filtration (B) Flow cytometry (C) Distillation (D) Flame Photometry
56. The country which uses maximum nuclear power is
(A) U.S.A. (B) Japan (C) France (D) Germany 57. Which bacteria removes copper from
low grade copper ore ? (A) Thiobacillus sp (B) Bacillus thuringiensis (C) Rhizobium sp (D) All of the above 58. Which of the following is not a part of
Geographic Information System (GIS) ?
(A) Projection (B) Overlay (C) Reclassification (D) Measuring distance and
connectivity 59. Ultrafiltration can remove (A) Suspended solids (B) Bacteria (C) Protozoa (D) All the above 60. A good automobile fuel, in addition to
having high calorific value, should have
(A) High ignition temperature (B) High viscosity (C) Low ignition temperature (D) Moderate ignition temperature
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Paper-III 10 D-89-12
61. Reserve food material in algae is (A) Starch (B) Cellulose (C) Protein (D) None of the above 62. The biodegradability of xenobiotics
can be characterized by (A) Rate of CO2 formation
(B) Rate of O2 consumption
(C) Ratio of BOD to COD (D) All of the above 63. The soil borne plant pathogens could
be controlled by (A) Lowering pH (B) Increasing pH (C) Adding lime (D) All of the above 64. A selective Lignin degrading fungus
belongs to (A) Soft rot (B) Brown rot (C) White rot (D) Red rot 65. The drastic reduction in the number of
intestinal pathogens during activated sludge process is the overall result of
(A) Competition (B) Competition and adsorption (C) Predation, competition and
adsorption (D) Competition, adsorption,
predation and settling
66. Which of the following disinfection method does not result in synthesis of organochlorine ?
(A) Chlorination (B) Chloroamination (C) Ozonation (D) None of the above 67. An organisms niche is (A) the way the organism uses the
range of physical and biological conditions in which it lives.
(B) all the biological and physical factors in the organisms environment.
(C) the function role played by the organism where it lives.
(D) the range of temperature that the organism needs to live.
68. The pyramid of biomass is invented in (A) Forest ecosystem (B) Greenland ecosystem (C) Aquatic ecosystem (D) All of the above 69. Which of the following chemicals of
anthropogenic origin mimics the effect of estrogen in animals ?
(A) Alkyl phenol (B) Polychlorinated biphenyl (C) O, p - DDT (D) All the above 70. Black Foot disease in human beings
caused due to use of water contaminated with
(A) Mercury (B) Cadmium (C) Silver (D) Arsenic
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D-89-12 11 Paper-III
71. Largest amount of fresh water is present in
(A) Lakes
(B) Rivers
(C) Glaciers
(D) Polar Ice
72. A threatened species is
(A) only endangered species
(B) only vulnerable species
(C) only rare species
(D) all of the above
73. Given below are two statements, one labelled as Assertion (A) and the other labelled as Reason (R).
Assertion (A) : Animals adopt various strategies to survive in hostile environment.
Reason (R) : Praying mantis is green in color which emerges with plant foliage.
Choose the correct code :
Codes :
(A) Both (A) and (R) are true, with (R) being the correct explanation of (A).
(B) Both (A) and (R) are true but (R) is not correct explanation of (A).
(C) (A) is true, but (R) is false.
(D) Both (A) and (R) are false.
74. Given below are two statements, one labelled as Assertion (A) and the other labelled as Reason (R).
Assertion (A) : Increasing temperature in the environment influences gonadal growth in fish.
Reason (R) : Increase in day length causes increase in environmental temperature in summer.
Choose the correct code :
Codes :
(A) Both (A) and (R) are true, and (R) is the correct explanation of (A).
(B) Both (A) and (R) are true, but (R) is not the correct explanation of (A).
(C) (A) is true, and (R) is wrong.
(D) (A) and (R) are wrong.
75. Match Column I with Column II :
Column I Column II
a. The Rio Summit 1. 1997
b. Johannesburg Earth Summit
2. 1972
c. Kyoto Protocol 3. 1992
d. The Stockholm Conference
4. 2002
Codes :
a b c d
(A) 3 4 1 2
(B) 1 2 3 4
(C) 4 3 2 1
(D) 2 1 4 3
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Paper-III 12 D-89-12
Space For Rough Work